Type-writing machine.



C. E. VOGEL.

TYPE WRITING MAGHINE.

APPLICATION EILED FBB.20, 1911.

Patented NOV. 25, 1913.

INVENTQR m .ww m

@En s'rnrns PATENT orrion.

CHARLES I-IEMAN VOGEL, F VACOUVER, BRITISH COLUMBIA, CANADA, ASSIGNOR T0 UNDEBWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPRATION 0F DELAWARE.

TYPE-WRITING MACHINE.I

1,079,731. specificationofteeersratent. 'rfnzenteaNov.25,1913,-,EL y

Application iilcdllieornaryzo, 1911. Seria1No.G09,700. i It To all whom t may concern: rangement is'such that when air is admitted '1 I Be it known that CHARLES HERMAN Vo to the end of the carriage-controlling.cylins.. GEL, a British subject, residing at Vancouver, der, it is also admitted to the line-space cyl-;=: county of Vancouver, Provmce of British inder; so that the line-space movement and s Columbia, in the Dominion of Canada, have the return movement of the carriage takesn invented new and useful Improvements in place simultaneously.

Type-Writing Machines, of which the fol- Other objects and advantages will here. 4;

lowing is a specification. inafter appear. This invention relates to the carriage con- In the accompanying drawings, Figurefl f 1o trol of typewriting machines, and its prinis a longitudinal section through the pneu-65 cipal object is to provide improved means matic cy inder, looking from the front, illus-Q1 for placing the carriage normally under ten- `trati'ng the manner of mounting the same, sion, so as to advance it in its letter feeding and showing also the means for 'attachingity u movement by coperating with the escapeto the carriage. Fig. 2 is a side view lar ely ment, and for enabling the carriageqto be resectional showing the invention as comb1nedf70 turned at the will of the operator rom any with an Underwood typewriting machinef point in a line. t

A further object of the invention isto proneumatic cylinder, showing a modified-fi vide improved margin stops for limiting the orm of the invention referred to above, in@

travel of the carriage, and also to provide which the cylinder moves instead of the pis-f1 75 improved means for producing the. lineton. 4 shows a portion of the en'dof'A Fig. 3 is a longitudinal section through-aevv wr:

space movement of the platen simultaneously the typewriter carriage, and shows the pneu-Vl -ffi with the return movement of the carriage. matic line-space cylinder in vertical section.V 7 ln carrying out my invention, I provide a On the base 20 supporting the typewritin'gfcylinder which is preferablylconnected to machine, brackets 19 are rovided to support 80 the typewriter frame with its longitudinal a pneumatic cylinder 1 wlth its axis horizons axis parallel tothe line of travel of the tal and parallel to the direction of movement et' ltypewriter carriage. A piston rod passes of the carriage. Within this cylinder, a'pis-'4 through this cylinder, and extends beyond ton head 2 isprovided on a rod 3. This rod All the ends thereof, the ends of the said piston passes through the piston and extends 185 rod having brackets or cross heads attached through movable stops 4c which form the-1. thereto. The piston is preferably connectheads of the cylinder. Beyond the heads Epil :52' ed to the carriage either directly or indithe ends of the piston rod 3 are provided rectly so that as the piston advances, the with rigid cross arms 29which` extend laterl carriage will be advanced. The cylinder ally and carry a rigid uide bar 30, which `is1"90 may have movable cylinder heads which parallelV to the axisA o the cylinder, and isff limit the relative movement of the piston 'guided in suitable guide brackets 36 whichL and cylinder and may be adjusted so as to extend up fromsaid brackets 19.k c These give the effect of adjustable margin stops. members 36 guide the piston and piston rod""' l i 40 A valve normally admits an operating Huid as the piston moves to and fro the cyli such as air, on that side of the piston which inder. j causes the carriage to advance in the letter- The brackets or cross arms 29 are prefer=4 feeding movement. By depressing a key, ably provided with sheaves orpulleys 31j* l this valve may be thrown to a reverse posi and cords 32,- which are attached to each-end tion to admit air on the opposite side of the of the cylinder, pass around these sheaves [100 piston and return the carriage. As thepisand are attached to a double link 33 which ,f

ton reaches either of the cylinder heads, the may be attached to a lug on the carriag'e- "1" exhaust of the air is preferably cut off, so 101 through the medium of a central open-"l that. a desirable cushioning effect is proing '34. The'cord at the left is not attached"'"j 50 duced. The linespace movement of the directly to this link 33, `but is attache'dllQ.

platen is preferably effected by means of a 'through the medium of a spring 35, anda"- pneumatic cylinder, the piston of which is turn buckle 102 may be interposed in tlie'gf connected with the line-space wheel and is cord to take up lost motion.y With this arlff actuated by compressed air controlled prefrangement, when the piston head 2 is forced erably by the aforesaid valve, and the ar tto the left, the link 33 willalso be movedy llo i toward the left, and move the carriage in the letter-feeding direction. On account of the arrangement of the cords 32 and sheaves 31, it will be evident that the carriage will have twice the amount of movement of the piston head.

In order to control the piston, I provide an air-chest 9 into which compressed air is admitted through a nipple 10, and this air is cont-rolled by an admission valve 11 having a stem 14 connected with lever 15 and rock shaft 16, which enables the valve to be moved by depressing a key 17, which is attached to the rock shaft, as shown.

A return spring 1S under the key 17 normally holds the valve 11 in the Fig. 1 position, so that air will be admitted through the righthand port- 5a and flexible hose 5, and through the cylinder head 4, passing a check valve 6, which opens toward the interior of the cylinder. The port opening through the cylinder head 4 adjacent to the Valve G may be regulated by a set screw 37. In this way tension is normally erected on the carriage which advances it in the letterfeeding movement when the eseapement operates.

At the will of the operator, by depressing the key 17, the valve 11 Will be reversed, admitting air through left port 5a, reversing the air pressure on the piston 2, and .forcing it toward the right. rIhe air in the right end of the cylinder is expelled through the port 7a, which will then be connected with the exhaust outlet 12.

As the piston 2 is approaching the right cylinder head in the return movement, the air before it is expelled through an exhaust port 4a which connects with a ex-ible hose 7 said hose being connected with a port 7aL in the cylinder wall opening onto the valve seat. The port-4a extends through the head 4 from the inner end of a pocket 4b formed in the inner face of the cylinder head, and a boss 221 is formed on the piston face which plugs this pocket as the piston reaches the end of its stroke. As the boss 21 enters the pocket 4b, thc'exhaust flow of air through the port 4a is cut oii, and the air which is thus caught in this end of the cylinder becomes compressed, and gives a cushion eect in arresting the piston. This air cannot escape through the check valve 6, as the increased pressure simply forces it-"more iirmly upon its seat. In order to regulate the flow through the port 4, a set screw 8 is provided in the cylinder head.

In order to adjust the position of the cylinder heads 4 to vary tlz..l point at which the carriage will stop in its eravel, each cylinder head is provided4 with a pair of racks 21, which mesh with pinions 22 carried on a transverse shaft 23, and rotatable by means of a hand-wheel 24. At the inner end of the shaft 23, a locking disk 25 is provided with a plurality of pertorations 25, disposed cquidistant and adapted to aline with a locking pin 26. A spring 28 around the shaft 23, normally holds one of the perforations 25a of the disk 25 in engagement with the pin, as shown in Fig. 2.

When a new adjustment is desired, the operator presses the hand-wheel 24 inwardly to disengage the disk 25 trom the pin, and the shaft should .then be rotated so as to move the racks 21 through the medium ot the vpiuions 22 into any position desired. When the hand-wheel 24 is released, it

should be held so that 4one of the openings.

25 will register with the pin 2G, and this holds the cylinder head fixed. On the for-` ward side ot one of the racks 21 a scale is formed, as indicated in Fig. 1, which enables the width of the margin on the paper to he ascertained at a glance. i

It should be understood that the parts on the right of center line C, Fig. 1, that is, the cylinder heads and the adjusting devices therefor, and the air hose connections, together with the air passages, are duplicated at the other end of the cylinder.

Instead of having the pneumatic cylinder ixed, I may let the cylinder move, and :l

then provide a pair of ixed pistons within the cylinder, as illustrated in Fig. 3, wherein 41 represents the cylinder, through the heads 52 of which tubular piston rods 43 and 51 pass. The tubular piston rod 43 is at- 'tached to the piston head 42, and the interior of the rod communicates with ay port 4G which leads back through an inwardly opening check valve 45, so as to admit air in the right-hand end of the cylinder.

Near the extreme end `of the tube 43, a port 44. is provided through the wall of the tube which permits air to flow directly -from A similar construction is provided in"eonnection with the other piston head 47, that is, it is provided with a port 48 communieating with the interior of the piston rod 51, and leading back through a check valve 49, so as1 to admit air to the left end of the cylinder; and this rod 51 is provided with a port 5() in its wall, through which air may flow directly into the left, end of the cylinder. The cylinder may be connected with the carriage as in the preferred form of the invention, or in any desired manner.

lVhen compressed air is admitted to the tubular rod 43, with the cylinder in the Fig. 3 position, it flows into the end of the cylinder through the port 44, and drives the cylinder toward the right to'return the carriage. Air is normally admitted to the,left end of the cylinder, and tends to move the cylinder toward ,the left to give the carriage its line-feeding movement. As the cylinder -approaches the limit of its travel, in either `the tubular rod 43 into the right end of the cylinder.

of the air ceases and no further exhaust can'- take place. This air is therefore caught in the cylinder and compressed, giving the effeet of a cushion. When air is admitted through the tubular rod 43,'it can always pass to the interior of the cylinder through the check valve 45, and will initiate a return movement of the carriage; as soon as the port 44 is uncovered, an increased iiow of air into the cylinder takes place.

Although I have described compressed ,air as the operating. medium, it is obvious that any compressed gas or fluid may be used instead of compressed air, and instead of using compressed air, I may operate the mechanism by creating a vacuum or partial vacuum, and produce the motive force by atmospheric pressure.,

I prefer to locate the key for operating this mechanism at a convenient point near or at the keybard.

.The spring 435 keeps the cords 32 taut and gives a desirable elasticity, permitting the piston 2 to'run ahead of the carriage, so that the spring draws the carriage inl coperating with the escapement. ln this way, thespring absorbs the momentum of the piston and itsl connected parts. The cord may be provided with a `turn buckle ,102 if desired, and .this turn buckle by adjusting the tensionl of thecord 32 will adjust the tension of the spring 35.

In order to produce the line-space moveo ment of the platen, a pneumatic cylinder 55 is attached on the end 54 of the carriage by means of a pivot screw 58. This cylinder is disposed in a substantially horizontal position and Within it a piston 56 travels, said piston being preferably hollow, and having an extension or rack 56, which is provided with inclined rack teeth 6:3, which engage corresponding teeth of a line-space wheel 64, which is rigid on the platen axle 64u. The large hollow dead space in piston 56 compared with the restricted inlet prevents fthe full pressure of the fluid from pressing the piston at once, so it starts slowly, and so is less likely to tear any thin work sheets which may lie against the platen. y

' VThe end of the cylinder'55, remote from the line-space wheel, is provided with a nip- `1 ple 61, and this nipple is connected by a -iexiblehose 13a' with nipple 13, which '30 communicates with theleft port 5*l in the I cylinder 1, and which leads to the left end of the cylinder. From this arrangement, when the valve 11 is moved to the right, to uncover the port 5 and admit air to air a5 -chest 9, a portion of this air 4iows through the hose 13a into the cylinder l55, and forces I the piston 56 outwardly. The teeth 63 then engage the teeth of the'linve-space Wheel and give the same a partial' rotation. Assoon as the valve 11 returns t'o the Fig. 1 position,

the air Within the cylinder 55 flows back` through the. hose 18u and through left port 5al into the left end of the cylinder 1, from which it escapes through thefleft port 7a and the exhaust outlet 12. y

The cylinder 55 is normally held .up by a spring 60, so as to keep the rack 56El yield* ingly in engagement with the line-space Wheel. Whenthe air is exhausted from the cylinder 55, the piston `56 is returned to the i Fig. 4 position by a return spring 57, and as the teeth 63 slip over the .teeth of the Vline-space wheel 64, a slight lateral vibration of the cylinder and piston takes place on a pivot 58 asan axis. A stop pin 59 above the cylinder limits the upward movement of thecylinder by the spring.;

Near. the end of the cylinder 55, adjacent the platen, a stop 62 is pivotally mounted, said stop having three shoulders 62, any one of which may be interposed in the path ol the end of the piston so as to limit the outward movement of the" piston. In this way, the amount vof rotation given to theline-space wheel is adjusted. I

ln Fig. 2 the invention is shown asapplied to an Underwood typewriting ma' chine, which includes a carriage `101 sliding fon a4 guide 103 and carrying a lug 100, which lug engages the link 33. Said carriage is drawn along by the piston 2 through said link, and in letter-feeding direction is con trolled by means of an escapement wheel 104, said escapement wheel being controlled in the usual manner by type keys 105, which, through hell cranks 106, swingtype bars 107 upwardly and rearwardly, so that heels 108 on said type bars actuate a `universal member 109. is controlled from said universal member by means of dogs 110 and 111, which are actuated by said universal member.

-Variations may be resorted to Within the scope oir' the invention, and portions of the improvements may be used without others.

Said escapement vvheel104v Having thus described my invention, I

claim:

- 1. In atypewriting machine, a pneumatic cylinder, a .piston movable with respect to said cylindermeans connecting said cylinder and said piston to the typewriter carriage to move the' same when al; relative movement occurs between said. piston and said cylinder, means for admitting an operating medium to one end of said cylinder,-

and a stop in the path of said piston to arrest it,and adapted to cushion the movement thereof by. trapping the fluid in the` cylinder.

' 2. ln a typewriting machine, in combina tion, a pneumatic cylinder, a piston movable therein, means for connecting said piston and said cylinder to the carriage to move the carriage in each direction, and adjustable cylinder heads in said cylinder limiting the moven'ient of said piston.

3. In a typewriting machine, a pneumatic cylinder, a piston movable therein, means for connecting said piston and said cylinder with the typewriter carriage to move the same, cylinder` heads movably mounted in said cylinder and limiting the movement of said piston, means for admitting anoperating fluid to said cylinder, 'means permitting the escape of said operating fluid before said piston, as the same advances, and .means for closing said last means to form a cushion before said piston, in arresting the movement thereof.

4. Ina typewriting machine, a pneumatic cylinder, a. piston movable therein, mechanism connecting said cylinder and said piston with the, carriage to move the carriage, movable heads in said cylinder limiting the movement of said piston, and means for admitting air into the interior of said cylinder through said heads.

In a t-ypewriting machine, a cylinder, a piston moving therein, said cylinder having an exhaust port for the operating me-.

dium, and means forming an extension of said piston for closing said port before said piston reaches the end of the stro-ke to form a cushion in advance thereof.

In a typewriting machine, a pneumatic cylinder having a head with a pocket on the inner face thereof, a piston moving within said cylinder, and having a boss adapted to enter said pocket, said head having an exhaust port within lsaid pocket adapted to lead the operating fluid from theinterior of said cylinder, said piston having aboss on the face thereof adapted to enter said pocket to cut ofi' outlet from said cylinder through said port, thereby cushioning, said piston at thc end of said stroke.

7. In a typewriting machine, the combination with a traveling carriage, of a cylinder and a pisten therein, means for admitting fluid to said cylinder to cause relative movement between said carriage and typewriter, a movable head compiisng a cushioning member in said cylinder, a rack for adjusting said head, and a stop holding said rae.

S. In a typewriting machine, the combination witlra traveling carriage, of a cylinder and' a piston therein, means for admitting fluid to said cylinder to cause relative movement between' said cylinder and piston, a cord fast to said carriage and fast to a fixed point on said frame, and a pulley moving with said movable meniber about which said cord passes to move sal carriage.

9. Inl a typewriting machine, the combination with a traveling carriage, of a fiuid operated cyhnder for returning said carriage at the. end of a line, a separate c 7lmder for operating a line-space mechanism, and a nation with a` traveling carriage, of a cylinder and a piston therein for driving said carriage by a compressible fluid and arranged to start said carriage rapidly, and a fiuid operated line-spacing mechanism arranged to operate said line-spacing mechanism slowly.

12. In a typewriting machine, the combination with a traveling carriage, of a cylinder and a piston therein for driving Said carriage ,by a compressible fluid and arranged tostart said carriage rapidly, a fluid operated line-spacing mechanism arranged to operate said line-spacing mechanism slowly, and a single valve controlling both carriage return and line spacingV mechanisms.

13. In a typcwriting machine, the colnbination with a traveling carriage, of a pneumatic cylinder, a piston in said cylinder, an opening for admitting compressed air to said cylinder, a check valve in said opening for preventing the outflow ofair, an exhaust opening for said cylinder. and a valve controlling said admission opening and said exhaust opening.

14. In a typewriting machine, the colnbination with a traveling carriage and a pneumatic cylinder, of a piston traveling` in said cylinder, an opening for admitting compressed air to said cylinder, a check 'alve in` said opening, an exhaust port for said cylinder so arranged wlth reference to said piston that at the end of the traveling of said piston, exhaust through said exhaust4 port is hindered, whereby the piston is cush ioned when arrested.

15. In a typewriting machine, the coml-l nation with a traveling carriage and a pmu matic cylinder` of a piston traveling` in saiil cylinder, a head adjustable in said Ili'ylinder for limiting the travel of said piston. a rara' fast on said head, a pinion meshing fti said rack, and a hand wheel for turning` will pinion to adjust said head. f i

16. In a typewriting machine, the combination with a traveling carriage and a puc.;- matic cylinder, of a piston in said cylinder,

j' nl l aA he'ad1 adjustable in said cylinder, a rack fast on said cylinder comprising a scale, a pinion comprising a hand Wheel meshing With said rack, and a detent for holding said hand Wheel in its adjusted position.

17. In a typewriting machine, the combination with a traveling carriage and a cylinder, of a head adjustable in said cylinder, two racks on said head, pinions meshing with said racks, a shaft on which said pinions are fast, and a hand Wheel fast on said Shaft.

18. In4 a typewriting machine, the combination With a cylinder, of a piston therein, a piston rod extending from each end of said 15 cylinder, a frame carried by the ends of said piston rod, pulleys carried on said frame., and a belt passing around said pulleys for driving the carriage.

CHARLES HERMAN VOGEL.

Witnesses AGNESv SCHAEFER, PHILIP D. ROLLHAUs 

